Big Sky Marathon
Race Day Weather
Hot conditions, hydrate often
Runners will face a temperature rise from 61°F at the start to a scorching 97°F by the finish. Wind will be a steady 17 mph from the S, providing some relief, but with low humidity at 25%. It's crucial to adjust pacing early and prioritize hydration throughout to manage the heat effectively.
Pace Calculator
Get forecast alerts for Big Sky Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Big Sky Marathon offers runners a thrilling point-to-point course through Montana's high mountains, starting at approximately 8,600 feet elevation and descending into the charming town of Ennis. This trail marathon is part of the Greater Yellowstone Adventure Series and features stunning mountain views throughout the challenging downhill route. The race is known as one of the longest downhill road marathons on the planet, making it a bucket list event for serious runners.
